Sewing-machine thread-case.



'1215.115,N-TB1'J-MAR.'20,'190mv -P.-D1BHL.. I ,SEWING MACHINE THREAD-GASE- APPLIOATI'ON H LBDAUG. a', 1905.

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PATENT PHI-LIP DIEEI,` OEELIZABETH, NEW JERSEY, AssIGNOR To. THE SINGER f MANIIEAOTURINey COMPANY, 'A CORPORATION OE NEW JERSEY.'

"SEWIN-z-MAGHlNE Tlv-lIREAD-QASIE.v

Specification oflietters Patent.

Patented March 2o, 190e.

Application led August .3, 1905. Serial Il'o.y 272,469.

T (2g/ZZ, whom, it concern.'

i Beit known that I, PHILIP DIEIIL, a citizen of the United States, residing at Elizabeth, in thecounty of Union and State of New Jersey, have invented certain new and useful Improvements` in Sewing-Machine Thread- Cases, ofwhich the followingy is a specification, reference being had therein to the accom anying drawings. i

T 's invention relates to anl improvement in that class of thread-cases for sewing-machine loop-takers which are providedfwith.,

open outer end topermit the easy introduc- 4tion and removal of the bobbin containing l low bobbin-supporting post iittedv to thetubular hub of the bobbin and serving as a 25 housing for a s lit l,locking-tube having a flanged outer en ladapted to enga Ve a conical countersink in the outer end of te bobbin, the loclnng-tube being pressed normally outward intoy operative locking position by means of a spring and adapted toV b e pressed inwardly into frictional engagement with the inner surface of the tubular` hub of the bobbin-case by means of a button bearing upon its outer end to carry the bobbin outward in reassuming its initial position. y The invention will be understood by reference to the annexed drawings, in which- Figure 1 is a sectional elevation of the bobbin-case with a filled bobbin locked therein; Fig. 2, an external elevation ofthe same with an empty bobbin shown partially ejected in readiness for 'removal by the operator, and Fig. 3 a plan of the bobbin-case and bobbin. Figs. 4, 5,6, 7, and -8 are detail views, Figs. 4, 5, and 7` being in section, representing, respectively, the press-button, the split lock- Ing tube or sleeve, the spring acting upon the latter, the bobbin-case, andthe screw-stud attached to and serving to .limit the outward movement of the press-button.. v

The bobbin-case 1 is ofa well-known cylindrical form open at the upper or outer end to receive the bobbin, which is composed of the flanges 3 and tubular hub 4, the latter being entered by the post 2'. The thread-case providedexternally with the annular flange 5, by means of which it is supported in the loop-taker, and with the usual segmentaltension-spring 6.` Within the hollow post 2, is itted the tubular split sleeve 7, having its in-` terior divided by a perforated partition-- flangevS, above which it is out away to form segmental spring-tongues 9, terminating in thefree ends in the flanges 10, rojectingla-terally slightly beyond thev cy indrical outer surface of the post 2 to engage the conical countersink 11 in the outer end of the 'bobbin. rLhe locking-sleeve 7 is held yieldingly in its outer position by means of a cylindrical spring 12, interposed between'its flange 8 and the bottom of the tubular cavity in the post 2, its outward movement being limited by engagement of its outer end with the shouldered inner end of a press-button, 13,

having`v` a shank 14 with screw-threaded socket-entered by the similarly-threadedr end 15 of a'shouldered screw-stud 16, passing upwardly through the bottom of thethreadcase and provided with a head 17, enteringa countersink therein provided for the same. The body ofthe screw-stud 1,6 is of cylindrical form to permit the downward movement of the same when the button 13 is pressed in such directionby the operator.'

As represented in Fig. 1, the thread-case is provided with a filled bobbin in readiness for` a stitching operation.

When the bobbin has become empty, it may be ejected to render it vaccessible for removal by thel Operator by merely `pressing inwardly or downwardly upon the press-button 13, which serves to force downwardly the split tube 7, whose locking-anges 10-are pressed inwardly'to- Ward the tapershank 14 of the button-by engagement with the conical countersink of the bobbin,'being thereby enabled to ride over such conical surface and into the cylindrical bore of the hub 4 for a short distance. Upon the release ofthe press-button 13 the latter follows the inger of the operator to its initial position, while thel lookin -flanges 1() continue to bind upon the hu 4 of the bobbin and in the outward movement of the tube '7 v I frictional engagement therewith the empty bobbin upwardly, with the upper flange slightly above the wall of the'thread-case, Where it may bereasily grasped by insertion under the action of the spring 12 to carry by underneath the same of the nails of the thumb and second inger of the operator for removal, thumb-nail notches 1S being provided for such purpose at opposite sides of the upper edge of the thread-case.

As will be observed, the outer end of the press-button 13 is preferably rounded off to prevent its catching the loops of needlethread as they are cast about the threadcase, and the latter is made of suiiicient depth to completely surround the bobbin for a like purpose.

While the present improvement is shown and described herein in itspreferred form, it is evident that the same may be materially varied in constructiony without departure from the present invention, the essential feature of which is the common central locking and ejecting device for the bobbin. While the ends of the bobbin are herein shown as provided with conical recesses or countersinks having a wedge-like action upon the yielding lateral flanges of the locking-tube, it is evident that such countersinks are not material to the present improvement, as the same effect may be produced by properly shaping the said lateral anges.

Having thus set forth the nature of the invention, what I claim herein isl. The combination with a sewing-machine thread-case, of a bobbin, an axially-movable I engaging member for said bobbin constructed and adapted to assume different operative relations therewith whereby it is caused to engage the said bobbin for looking it in and ej ecting it from operative position within the thread-case, and means for giving said member its axial movements.

2. The combination with a sewing-machine thread-case provided with a central hollow bobbin-supporting post, of'a bobbin having a tubular hub fitted to said post, an inwardlyyielding and axially-movable locking device housed within said hollow post and normally engaging the outer end of said bobbin, and means for yieldingly pressing said locking device into normal locking relation with said bobbin but permitting it to enter the hub of' the latter and rictionally engage the same.

3. The combination with a sewing-machine thread-case provided with a central hollow bobbin-supporting post, of a bobbin having a tubular hub iitted to said post, an axiallymovable tubular sleeve housed within said post and having a split and externally-flanged outer end normally engaginor the outer end of said bobbin and adapted lor frictional engagement with the inner wall of its tubular hub, and a spring for pressing said sleeve into outer operative relation with said bobbin.

4. The combination with a sewing-machine thread-case provided with a central hollow bobbin-supporting post, of a bobbin having a tubular hub fitted to said post, an axialIjmovable tubular sleeve housed within said post and having a split and externally-hanged outer end normally engaging the outer end of said bobbin and adapted lier frictional engagement with the inner wall of its tubular hub, a spring for pressing said sleeve into outer operative relation with said bobbin, and a button adapted to engage the outerflanged end of said sleeve and having a shank extended through the same and terminating in a shouldered stud with the head in normal con,- tact with the bottom of the thread-case to limit the outward movement of said button under the action of said spring.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.

PHILIP DIEI-IL.

Witnesses:

H. J. MILLER, H. A. KORNEMANN. 

